All-Consuming: Plotting and Writing (and Deleting) Process

I've been struggling at this for weeks, but if I'm going to do it at all, I really must do it now, before I forget any more than I've already forgotten. Here's a partial behind-the-scenes view of the writing of All-Consuming.

Caveats, warnings, things that you need to read for my peace of mind:
-Spoilers for the whole fic, obviously, but also for the epilogue/extra chapter, "The Cleanup".
-I have a terrible autobiographical memory. I've tried to write mostly about the strategies I used, which I know quite well, rather than the order of events, which I've had to piece together.
-This is rambly. I tried to make it tighter, but I just. Couldn't. I'm actively learning how to write about writing here.
-None of this is writing advice; take anything that seems useful and run with it, by all means, but I don't mean to imply that I did anything "right". Or wrong! It's just what I found myself doing as I made my way through this fic.

( Gory details. )

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Okay, that's all I've got for now. Questions are welcome — I'm not sure how clear I was here, and this is nowhere near a complete documentation of how the fic got made, anyway. I'm also curious about everyone else's plotting and writing habits and strategies, so please share thoughts!